Adsorption kinetics of o-xylene by flyash

Banerjee, Kashi; Cheremisinoff, Paul N.; Cheng, Su

doi:10.1016/s0043-1354(96)00003-6

Cited by 103 publications

(52 citation statements)

References 10 publications

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“…An identical trend was also observed by other investigators. 13 The values of k' decreased with increasing temperature. Low temperatures favour the adsorption of tannin onto PILC.…”

Section: Resultsmentioning

confidence: 95%

Sorption of tannic acid on zirconium pillared clay

Vinod

Anirudhan

2001

J of Chemical Tech & Biotech

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Zirconium pillared clay (PILC) was prepared using montmorillonite as the base clay. Adsorption of tannic acid (tannin) was studied by a batch equilibrium technique, as a function of adsorbate concentration, temperature, pH, agitation speed, particle size of the adsorbent and ionic strength. The process of uptake is governed by diffusion controlled ®rst-order reversible rate kinetics. The higher uptake for the pH range 4.0±6.0 was attributed to external hydrogen bonding between phenolic-OH groups of tannin molecules and the hydrogen bonding sites on the clay. The removal of tannin by adsorption was found to be >99.0% depending on the initial concentration in the pH range of 4.0±6.0. The process involves both ®lm and pore diffusion to different extents. The effects of solute concentration, temperature, agitation speed and particle size on the diffusion rate were investigated. Tannin uptake was found to increase with ionic strength due to the compression of diffuse double layers. The applicability of Langmuir and Freundlich isotherm models has been tested. The maximum adsorption capacity of PILC was found to be 45.8 mmol g À1 of clay and the af®nity constant is 2.9 Â 10 À2 dm 3 mmol À1 at 30°C. Thermodynamic parameters such as DG°,DH°and DS°were calculated to predict the nature of adsorption. The isosteric enthalpies of adsorption were also determined and found to decrease with increasing surface coverage. Regeneration with hot water (60°C) has been investigated for several cycles with a view to recovering the adsorbed tannin and also restoring the sorbent to its original state.

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“…An identical trend was also observed by other investigators. 13 The values of k' decreased with increasing temperature. Low temperatures favour the adsorption of tannin onto PILC.…”

Section: Resultsmentioning

confidence: 95%

Sorption of tannic acid on zirconium pillared clay

Vinod

Anirudhan

2001

J of Chemical Tech & Biotech

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“…In order to examine the potential influence of diffusion on the retention kinetics we fitted our experimental data to the equations of Banerjee et al [40], Carman and Haul [41], and Aharoni and Suzin [30]. The results provided by all these equations were consistent; by way of example, Table 5 gives those provided by that of Banerjee et al…”

Section: Diffusion Of Adsorbate Molecules Through Sorbent Particlesmentioning

confidence: 62%

Retention of progesterone by four carbonaceous materials

Valenzuela-Calahorro

Navarrete-Guijosa

Stitou

et al. 2004

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…Such a value (5-40 KJ/mol) is characteristic for a diffusion and physisorption controlled process [30], suggesting that the Cu 2+ ions are removed mainly due to the electrical double layer effect although the existence of electrodeposition reaction. Figure 5(b) shows the van't Hoff plot for the electrical removal of CuCl 2 onto CNT-CNF electrodes.…”

Section: Resultsmentioning

confidence: 99%

Electrical Removal Behavior of Carbon Nanotube and Carbon Nanofiber Film in CuCl₂Solution: Kinetics and Thermodynamics Study

Zhan

Nie

Pan

et al. 2011

International Journal of Electrochemistry

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The kinetics, thermodynamics, and isotherms during electrical removal of Cu 2+ by carbon nanotube and carbon nanofiber (CNT-CNF) electrodes in CuCl 2 solution were studied under different solution temperatures, initial Cu 2+ concentrations, and applied voltages. The result shows that Langmuir isotherm can describe experimental data well, indicating monolayer adsorption, and higher Cu 2+ removal and rate constant are achieved at higher voltage, lower initial Cu 2+ concentration, and higher solution temperature. Meanwhile, the thermodynamics analyses indicate that the electrical removal of Cu 2+ onto CNT-CNF electrodes is mainly driven by a physisorption process.

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Adsorption kinetics of o-xylene by flyash

Cited by 103 publications

References 10 publications

Sorption of tannic acid on zirconium pillared clay

Sorption of tannic acid on zirconium pillared clay

Retention of progesterone by four carbonaceous materials

Electrical Removal Behavior of Carbon Nanotube and Carbon Nanofiber Film in CuCl₂Solution: Kinetics and Thermodynamics Study

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Adsorption kinetics of o-xylene by flyash

Cited by 103 publications

References 10 publications

Sorption of tannic acid on zirconium pillared clay

Sorption of tannic acid on zirconium pillared clay

Retention of progesterone by four carbonaceous materials

Electrical Removal Behavior of Carbon Nanotube and Carbon Nanofiber Film in CuCl2Solution: Kinetics and Thermodynamics Study

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Product

Resources

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Electrical Removal Behavior of Carbon Nanotube and Carbon Nanofiber Film in CuCl₂Solution: Kinetics and Thermodynamics Study